Question

How to to check if all the characters of a string are with same frequencies in C

Answer 1

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
     
bool same_frequencies(char s[]) { 
    int letters[256] = {0}; 
	int len = strlen(s);
      
    for (int i = 0; i < len; i++) {
         if (isalpha(s[i]))
             letters[(int)s[i]]++;
    }
     
	int frequencies = 0; 
	for (int i = 0; i < 256; i++) { 
		if (letters[i] != 0) {
			frequencies = letters[i];
			break;
		}
	}
	
    for (int i = 0; i < 256; i++) { 
        if (letters[i] != 0 && (letters[i] != frequencies)) {
            return false;
        }
    } 
	return true;
} 
int main() 
{                       
    char s[] = "aaabbbcccwww"; 
         
    if (same_frequencies(s))
		puts("yes");
	else
        puts("no");
  
    return 0; 
} 
       
       
       
/*
run:
       
yes
       
*/

 

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